package com.collection.treesets;

import java.util.TreeSet;

public class SimpleJavaTreeSetExample {
	public static void main(String[] args) {
		   
	    //create object of TreeSet
	    TreeSet tSet = new TreeSet();
	   
	    /*
	      Add an Object to TreeSet using
	      boolean add(Object obj) method of Java TreeSet class.
	      This method adds an element to TreeSet if it is not already present in TreeSet.
	      It returns true if the element was added to TreeSet, false otherwise.
	    */
	   
	    tSet.add(new Integer("1"));
	    tSet.add(new Integer("2"));
	    tSet.add(new Integer("3"));
	   
	    /*
	      Please note that add method accepts Objects. Java Primitive values CAN NOT
	      be added directly to TreeSet. It must be converted to corrosponding
	      wrapper class first.
	    */
	   
	    System.out.println("TreeSet contains.." + tSet);  
	  }
}
